KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Monday, August 22, 2016

The solar saga - part 2: Getting the system online

In part one (March 2, 2016) I wrote about why I chose to use a series string inverter system. (Hint: It was to prevent radio-frequency in...

Tuesday, August 9, 2016

A latching low-voltage disconnect for 12 volt lead acid and lithium batteries (non auto-resetting)

Figure 1: The as-built and working prototype constructed. This version does NOT automatically reset itself - by design. Click on the i...

Friday, July 15, 2016

Fixing the squealing auto-tuner motors in the Kenwood TS-450

Important: If you own a Kenwood TS-450 - or perhaps any other radio - and the motors squeal when the auto-tuner activates, DO NOT ignore ...

Sunday, June 12, 2016

A 1:1 balun was the best overall choice for feeding the horizontal loop...

Years ago I bought a Heathkit SA-2060 (non "A" version) 2kW-rated antenna tuner at a local swap meet for a good price. While no...

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